The pattern is always the same: the project starts, a wall comes down, suspect board appears, work stops. Now the programme carries an emergency survey, analysis turnaround, a licensed removal mobilised at short notice, and every following trade re-booked — plus a possible
contamination clean-up if the material was smashed before anyone recognised it. Against that, a domestic R&D survey typically costs a few hundred pounds and returns in days. It is the cheapest insurance on the whole project.